Linux learning -04-file and directory management-1

Absolute path: The path is written "must be from the root directory/write", for example:/usr/share/doc this directory.

Relative path: The path is written "not by/written", for example, by/usr/share/doc to the bottom of/usr/share/man: CD. /man

The absolute path is used: The correct degree is higher, and the absolute path is recommended when writing a program management system.

The use of relative road strength: It is convenient to switch long directories.

Operation Commands for Directories:

CD Change Directory switch directories

PWD Print working directory displays the current directory-p displays the actual path

mkdir make directory-m set directory permissions directly mkdir-m 711 Test2

Create a new directory-p recursively create a directory mkdir-p Test1/test2/test3/test4

RmDir Delete an empty directory-P together with the upper "empty" directory also deleted

Rmdir-p Test1/test2/test3/test4

-R Delete all contents of the directory Rm-r test

. Represents the current directory

.. Represents a previous level directory

-Represents a previous working directory

~ Represents the home directory where the "current user" resides

~account represents the user's home directory (account is a name)

The variable that executes the file path $path

See what directories are defined? Echo $PATH

LS Viewing files and directories

-A All files include hidden files

-l List Detailed properties Ls-l = ll

Ls-al list the properties of all files in the directory including hidden files

CP Copy Copy

CP Source File Destination file

-I if the target file exists asking whether to overwrite

-a The copied file is exactly the same as the source file properties =pdr

RM Remove to delete a file or directory

-F force forcibly removed without prompting

-R Delete all content in the directory

MV Move moves files or directories or renames

-F force forcibly moved without prompting

-U target exists and the source file is newer before it is updated

Get the file name Basename/etc/sysconfig/network

Get Directory name Dirname/etc/sysconfig/network

View Archive Contents

Cat starts with the first line

TAC starts with the last line

NL Show and lose travel number

More rows in a row display

Less row display, and can page forward

Head's just a few lines.

Tail only look at the tail a few lines

OD binary mode read data

Linux learning -04-file and directory management-1